Deepak Saxena wrote: > simply grabbing that irq via request_irq() causes USB > device insertion (and other things?) to break.
I had a related problem in OFW - enabling the SMBALRT# pin (for DCON use) caused immediate wakeups from suspends (in OFW-based testing). OFW's solution is to enable SMBALRT# for the shortest possible time, just when it is being tested. I wonder if a similar narrow-enable approach could be used with request_irq()? I can see how that might be tricky. Alternatively, could Linux avoid using interrupts for that DCON sync function, polling with interrupts disabled like OFW does? The overall system performance impact should be small, since the maximum wait time is only one video frame, and it only happens a freeze points, which are presumably times of low activity. _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
